Dovecot Settings Types¶
String settings are typically used with variable expansion to configure how
something is logged. For example
imap_logout_format = in=%i out=%o
# character and everything after it are comments. Extra spaces and tabs
are ignored, so if you need to use these, put the value inside quotes. The
quote character inside a quoted string is escaped with
key = "# char, \"quote\", and trailing whitespace "
Unsigned integer is a number between 0..4294967295, although specific settings may have additional restrictions.
Boolean settings interpret any value as true, or false.
no are the recommended values. However,
yes. Whereas, only
no will work as false.
All these are case-insensitive. Other values give errors.
The size value type is used in Dovecot configuration to define the amount of space taken by something, such as a file, cache or memory limit. The size value type is case insensitive. The following suffixes can be used to define size:
B = bytes
K = kilobytes
M = megabytes
G = gigabytes
T = terabytes
The values can optionally be followed by “I” or “IB”. For example K = KI = KIB. The size value type is base 2, meaning a kilobyte equals 1024 bytes.
The Time value is used in Dovecot configuration to define the amount of Time taken by something or for doing something, such as a sending or downloading file, processing, and more. The Time value supports using suffixes of any of the following words:
secs, seconds, mins, minutes, msecs, mseconds, millisecs, milliseconds, hours, days, weeks
So for example “d”, “da”, “day”, “days” all mean the same.
Combination of a positive integer number and a time unit. Available time units are mentioned above. To match messages from last week, you may specify
since 1w, since 1weeks or since 7days.
Same as Time, but support milliseconds precision.
The IP can be IPv4 address like
127.0.0.1, IPv6 address without brackets
::1, or with brackets like
[::1]. The DNS name is looked up once
during config parsing, e.g.
host.example.com. If a /block is specified,
then it’s a CIDR address like
220.127.116.11/24. If a /block isn’t specified, then
it defaults to all bits, i.e. /32 for IPv4 addresses and /128 for IPv6